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01.12.2019 | Research | Ausgabe 1/2019 Open Access

Cardiovascular Ultrasound 1/2019

Comparison of the prognostic values of three calculation methods for echocardiographic relative wall thickness in acute decompensated heart failure

Zeitschrift:
Cardiovascular Ultrasound > Ausgabe 1/2019
Autoren:
Satoshi Yamaguchi, Michio Shimabukuro, Masami Abe, Tomohiro Arakaki, Osamu Arasaki, Shinichiro Ueda
Wichtige Hinweise

Supplementary information

Supplementary information accompanies this paper at https://​doi.​org/​10.​1186/​s12947-019-0179-6.

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Abstract

Purpose

Left ventricular (LV) wall thickness can be measured at the posterior wall (PW) and the intraventricular septum (IVS) in a parasternal long axis view by transthoracic echocardiography. Thus, there are three methods to calculate relative wall thickness as follows: RWTPW = 2 × PWth/LVDd; RWTIVS + PW = (IVSth + PWth) /LVDd; and RWTIVS = 2 × IVSth/LVDd (IVSth = interventricular septum thickness; LVDd = LV internal dimension at end--diastole; PWth = posterior wall thickness). The aim was to compare the prognostic values of these RWTs in patients with acute decompensated heart failure (ADHF).

Method

This was a single-center, retrospective, observational study at a Japanese community hospital. A total of 389 hospitalized ADHF patients were divided into two groups based on the three median RWT values. The primary outcome was all-cause death. Survival analysis was performed, and Cox proportional hazard models unadjusted and adjusted by Get With The Guideline score were used.

Results

High-RWTPW had poor survival (log-rank, P = 0.009) and was a significant risk (unadjusted HR (95%CI), 1.72 (1.14–2.61), P = 0.01; adjusted HR, 1.95 (1.28–2.98), P = 0.02). High-RWTIVS + PW was not associated with poor survival on survival analysis or the unadjusted Cox model. Only the adjusted Cox model showed that High-RWTIVS + PW was associated with a significant risk of the primary outcome (unadjusted HR (95%CI), 1.45 (0.96–2.17), P = 0.07; adjusted HR, 1.53 (1.01–2.32), P = 0.045). High-RWTIVS did not have significant prognostic value.

Conclusions

When calculating RWT, RWTPW should be recommended for evaluating the mortality risk in ADHF.
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